Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Taxes [Line Items]
Liability for uncertain tax positions	$ 200		$ 100
Income tax expense	$ 551	$ 779
Effective income tax rate	29.80%	18.60%
Foreign Subsidiaries [Member]
Income Taxes [Line Items]
Deferred income taxes on undistributed earnings	$ 1,000		$ 900
Federal Authorities [Member]
Income Taxes [Line Items]
Open tax years	2017
State and Foreign Authorities [Member]
Income Taxes [Line Items]
Open tax years	2014